中国物理B ›› 2013, Vol. 22 ›› Issue (7): 77502-077502.doi: 10.1088/1674-1056/22/7/077502
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
高庆庆a, 李静波b, 李冠男a, 饶光辉c, 骆军a, 刘广耀a, 梁敬魁a
Gao Qing-Qing (高庆庆)a, Li Jing-Bo (李静波)b, Li Guan-Nan (李冠男)a, Rao Guang-Hui (饶光辉)c, Luo Jun (骆军)a, Liu Guang-Yao (刘广耀)a, Liang Jing-Kui (梁敬魁)a
摘要: The R/Ba-ordered and R-site mixed compound Y0.5La0.5BaMn2O6 has been synthesized in which (Y, La) and Ba are regularly arranged while Y and La randomly occupy the R-site. Y0.5La0.5BaMn2O6 has a tetragonal unit cell with a space group of P4/mmm. A structural transition between tetragonal and orthorhombic is observed at about 325 K by X-ray powder diffraction (XRD). Thermal magnetic measurement shows the occurrence of an antiferromagnetic transition at the temperature TN~190 K. Anomalies in magnetization, resistivity and lattice parameters observed around 340 K indicate a charge/orbital order transition accompanying the structural phase transition. R-site randomness effect is discussed to interpret the different properties of Y0.5La0.5BaMn2O6 between NdBaMn2O6 and SmBaMn2O6.
中图分类号: (Orbital, charge, and other orders, including coupling of these orders)